Malicious PDF — malware analysis report

Static analysis result for SHA-256 08a164e67413b091…

MALICIOUS

PDF

98.6 KB Created: 2021-04-11 08:59:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 76023ff89b913aa436d503e5f0d71534 SHA-1: 20b289b50bcd10b74c4bc1d8e1a1b675ea28f301 SHA-256: 08a164e67413b0918706d0aaabc8099ffdc1f5acab9299d686a7065654d9798f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links pointing to disposable domains and link farms, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://jacksth.ru/strik?utm_term=battletech+mechs+list PDF link annotation
    • https://rogaturo.weebly.com/uploads/1/3/1/0/131069781/7a3b9a.pdfIn PDF document text
    • https://losopaxirusegu.weebly.com/uploads/1/3/0/8/130813120/rudeduzibemu.pdfIn PDF document text
    • http://pojapusevipuzu.mypressonline.com/nexerufomuxiwize.pdfIn PDF document text
    • https://nolelagisumo.weebly.com/uploads/1/3/4/1/134132353/3978630.pdfIn PDF document text
    • https://cdn.sqhk.co/vujagefamig/ighgrhf/tegisenukemetolixomekes.pdfIn PDF document text
    • https://musegozaxugovu.weebly.com/uploads/1/3/0/8/130873783/xupowikexoboxonur.pdfIn PDF document text
    • https://cdn.sqhk.co/nexoratuxi/b5VHifd/63980744270.pdfIn PDF document text
    • https://cdn.sqhk.co/fofotixoz/ijriigh/cafetaria_marco_enschede.pdfIn PDF document text
    • http://likefetevu.getenjoyment.net/kagejuwe.pdfIn PDF document text
    • http://vezawerogodeget.iblogger.org/l_anatomie_en_orthophonie.pdfIn PDF document text
    • http://bagerisevi.scienceontheweb.net/autodwg_to_dwg_converter_full_download.pdfIn PDF document text
    • https://cdn.sqhk.co/girewobo/je6jhjf/16290712174.pdfIn PDF document text
    • http://dadevizevarek.scienceontheweb.net/ielts_writing_task_2_academic.pdfIn PDF document text
    • https://xopozutafedas.weebly.com/uploads/1/3/1/4/131453480/tebegorixi-xumowiris-jupawuwukale-fipese.pdfIn PDF document text
    • https://cdn.sqhk.co/jupozaregu/qzjgRH9/97495725796.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://da9d63b4-fbfd-4f6f-88e7-06ac0d76355b.filesusr.com/ugd/ca300b_972ca74c826249498865d582e3d67200.pdf?index=trueIn PDF document text
    • http://zeborerafo.rf.gd/anhaltende_somatoforme_schmerzstrungen.pdfIn PDF document text
    • http://tasibufoz.rf.gd/bozalagidelujem.pdfIn PDF document text
    • https://c07b3cb0-7d4a-4e65-9c62-eb3bd0ce3b6b.filesusr.com/ugd/7560d5_3919e3666af4495689aa2ddd05869ec3.pdf?index=trueIn PDF document text
    • https://dc5983eb-04eb-4341-be6e-5f763cf8c8d0.filesusr.com/ugd/979c04_c2b8055b216145f8aa2114844a26336e.pdf?index=trueIn PDF document text
    • http://jipokogave.epizy.com/california_dmv_renewal_test_answers.pdfIn PDF document text
    • http://wixesikive.epizy.com/72265228170.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001460b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1460B 4992 bytes
SHA-256: c192a2dd778bc2f9191b029bbd548fa9bf5ebb16ea3d3a1f408687757bd8b8f4
font_01_sfnt_off000156dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156DD 11328 bytes
SHA-256: 3c679f692cbb167081ff9a0d52d3c68d99b85d6fe9fd129a8056f9b50d1e57a8

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